Ostbataillonen

Ostlegionen ("eastern legions"), Ost-Bataillone ("eastern battalions"), Osttruppen ("eastern troops"), Osteinheiten ("eastern units") were military units in the Heer (army) of Nazi Germany, during World War II that were made up of personnel from countries comprising the Soviet Union. They represented a major subset within a broader use of use of non-German forces by the Wehrmacht (which, apart from the Heer, included the Waffen SS).

Some members of these units were conscripted or coerced into serving, whilst others volunteered. Many were former Soviet personnel, recruited from prisoner of war camps. Osttruppen were frequently stationed away from front lines and used for coastal defence or rear-area activities, such as anti-partisan operations, thus freeing up regular Axis forces for front line service.

They belonged to two distinct types of units:

Members of Osteinheiten usually faced execution or harsh terms of imprisonment, if they were captured by Soviet forces or repatriated to the USSR by the western Allies.

Ost-Bataillone wore German uniforms and equipment and were integrated into larger German formations. They began as the private initiatives of individual military commanders, but eventually became formalized and by late 1943 they contained 427,000 personnel, a force equivalent to 30 German divisions. Most were utilized on the Eastern Front and in the Balkans.

During 1944, a number of Ost-Bataillone were stationed in northern France, in anticipation of a western Allied invasion. Units that fought in the Battle of Normandy were part of the German static infantry divisions 243 and 709, positioned in the vicinity of the Utah, Juno and Sword invasion beaches. Ost-Bataillone were also present in southern France, during the Allied landings codenamed Operation Dragoon (August 1944).

...
Wikipedia